【摘要】 分别以Ｃｕ０／２ ，２′联吡啶（Ｂｐｙ） 和ＣｕＣｌ２／Ｂｐｙ 配合物为催化剂，ＣＣｌ４ 和偶氮二异丁腈（ＡＩＢＮ） 为引发剂，较为详细地研究了苯乙烯的原子转移自由基乳液聚合规律．结果表明：其乳液聚合体系均显示出了“活性”聚合的基本特征，即数均分子量与转化率呈线性关系，但聚合反应一经引发，聚合物的分子量就达数万，且分子量约为理论值的５ 至２０ 倍；Ｃｕ０／Ｂｐｙ／ＣＣｌ４ 体系的ＭＷＤ 与本体聚合相当，而ＣｕＣｌ２／Ｂｐｙ／ＡＩＢＮ 体系的ＭＷＤ 比其本体聚合体系大，最小为１－６４ ；研究Ｃｕ０／Ｂｐｙ／ＣＣｌ４ 体系发现，乳液聚合与悬浮聚合在“活性”特征上没有本质的区别，但两者在动力学上有些差异；跟踪乳液聚合过程中的ｐＨ 值发现，体系中的ｐＨ 值随反应时间的延长呈下降趋势，并可能影响聚合速率．更多还原

【Abstract】 The emulsion polymerization of styrene by Cu 0/2,2′ bipyridine (Bpy)/CCl\-4 and CuCl\-2/Bpy/azobisisobutyronitrile (AIBN) catalyst/initiator system was studied,respectively.The results show that the molecular mass increased in linear with the conversion of monomer,which hints the emulsion polymerization may be a “living/controlled” system,and the incipient molecular mass,which are as 5 to 20 times as the theory one,may be up to 10,000s once the polymerization was initiated.The polymer MWD from Cu 0/Bpy/CCl\-4 emulsion system accords with that from its bulk polymerization.Moreover,the MWD from CuCl\-2/Bpy/AIBN emulsion system is broader than that from its bulk polymerization,but the narrowest one in this emulsion system can reach 1.64.Essentially,no difference was found between emulsion and suspension polymerization in “living” character but in kinetics.It was found that the pH\|value decreased in the course of polymerization,the descending rate of pH value may influence on polymerization rate.更多还原